Nailmaking machine



10 Sheets-Sheet l Filed July 12. 1951 ATTURNEY April 6, 1954 J. M. BoLAo2,673,979 NAILMAKING MACHINE Filed July 12, 1951 l0 Sheets-Sheet 2 gj115 H6 170 772 INVENTDR April 6, 1954 J. M. aoLAo NAILMAKING MACHINE 10Sheets-Sheet 3 |NVENTDR l m y, llrf w. .w ma, @w

ATmRNEY,

April e, 1954 11150111190 2,673,979 NAILMAKING MACHINE Filed July 12,1951 l0 Sheets-Sheet 4 i INVENTCIR, [um /laba 4W/L Affi ATTORNEY April6, 1954 l 1. M. BOLAO NAILMAKING MACHINE Filed July l2, 1951 10Sheets-Sheet 5 ATTORNEY April 6, 1954 J. M. BOLAQ 2,673,979

NAILMAKING MACHINE Filed July 12, 1951 10 Sheets-Sheet 7 149" d 1&4 14/'55 if fa] I INVENTUR f2@ Je; QW mw l April 6, 1954 1 M, BQLAO 2,673,979

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INVENTDR/ AWUHNIE'Y J. M. BOLAO NAILMAKING MACHINE April 6, 1954 -Filed.July 12, 1951 l0 Sheets-Sheet 9 ATTE! RN EY INVENTDR April 6, 1954J.M.BOLAO NAILMAKING MACHINE Filed July 12, 1951 l0 Sheets-Sheet l0 i1x32 44 j@ i R-ns r W @L LNVENTR/ AEN /Z 521% ATTCIRNEY Patented Apr. 6,7,1954

UNiTEo STATES OFFICE 26, 1948. This No. 236,301

Claims.

The present invention relates to nail making machines and is acontinuation of my copending U. S. -patent application Ser. No. 40,735filed July 26, 1948.

More specifically, the present invention relates to a nailmaking machineof the type which forms nails from sheet metal blanks, which shallfurthermore be adapted during the same working cycle to drive the nailsfabricated thereby into a workpiece, the double function being performedonce for every full cycle of operation of the main working parts.

A number of nailing machines are known having various operating systems,in all of which, however, nails made'outside the machine have to be fedthereto.

According to the present invention, the nailmaking and naildrivingoperations can both be performed by the one machine, due to the use ofsheet metal blanks, which require only forming or pressing in order toproduce nished nails, and, by reason of the fact that they are blanks,that is to say, small, flat metal plates, may be conveniently andcompactly stored in the-machine itself.

The advantages of the machine of the present invention may be comparedtov those of a stapling machine of the so-called sewing type, in whichthe staples are formed and applied, as and when required, from wire fedto the forming and sta- .o

pling means from a supply coil.

It is, therefore, a principal object of the present invention to providea nailmaking machine adapted to drive into a workpiece the nails madethereby.

A further object is to provide a machine of the type described includinga reciprocating hammer member and a reciprocating slide structurecomprising a plurality of cam actuated blank feeding and nail formingmembers.

A further object is to provide a nail making machine of the typedescribed including a reciprocable slide structure comprising a magazinefor nail blanks and a toggle actuated nail-forming ram means cooperatingwith a nail-forming groove and a relatively stationary head formingmember to completely form a nail from a nail blank in one operation.

- These and other objects and advantages of the present invention willb-ecome apparent in the course of the following detailed description ofcertain preferred embodiments thereof illustrat'ed in the accompanyingdrawings, in which:

yFigzjl is a general perspective view, of one embodiment of a combinednailmaking and nailing application July 12,

1951, Serial machine of the present invention with certain parts brokenaway to show internal construction.

Fig. 2 is a perspective View of an end cover plate for a crossheadchamber forming part of the machine.

Fig. 3 is a perspective View of a slide structure and guide block inassembled relationship with certain parts broken away and showing theworking parts in their lowermost position.

Fig. 4 is a perspective view of a cam groove member showing the insideface thereof, said cam groove member forming part of the guide blockshown in Fig. 3 and being adapted to govern the operation of anail-forming member.

Fig. 5 is a perspective view of a second cam groove member showing theinside face thereof, said second cam groove member also forming part ofthe guide block of Fig. 3 and being adapted to govern the operation of ahead forming instrumentality mounted in said guide block.

Fig. 6 is a perspective view of the slide and guide assembly showing therear face of the guide block with certain parts broken away toillustrate the cam for actuating the feed bar to place a blank inposition to be formed into a nail.

Fig. '7 is a perspective view of a portion of the reciprocating slidestructure with certain parts broken away.

Fig. 8 is a side elevation of a detachable accessory part of thereciprocable slide structure illustrating the guide construction for theheading member shown in Fig. 10.

Fig. 9 is an end view of the member shown in Figure 8.

Fig. 10 is a perspective view of a heading member.

Fig. 11 is a perspective view of a guide plate to be mounted in theslide structure for guiding the heading member, as shown in Fig. 18.

Fig. 12 is a perspective view of a stop plate to be mounted in the slidestructure for limiting the inward stroke of the heading member, as shownin Fig. 18.

Fig. 13 is a perspective view of a feeder block which is also anaccessory part of the reciprocable slide structure.

Figs. 14 and 15 are elevations of opposite sides of the feeder block ofFigure 13.

Fig. 16 is a perspective view of the assembled reciprocable slidestructure.

Fig. 17 is a cross-section of the guide block and slide structure inassembled relationship the plane of section'being indicated at XVII-XVIIin Figure 16, and being taken parallel to the bottom face of thereciprocable slide structure.

Fig. 18 is a cross-section similar to that of Fig. 17 but with referenceto the plane XVIII-XVIII of Figure 16, also taken parallel to the bottomface of the reciprocable slide structure.

Fig. 19 is a side view of a hammer bar forming part of the machine.

Fig. 20 is an edge-on view of the hammer bar of Figure 19.

Fig. 21 is a front elevation of the cross-head chamber, reciprocableslide member and guide block assembly with certain parts broken away,the working parts being shown in their lowermost position.

Fig. 22 is a fragmentary View showing the guide block in section and thereciprocable ture partly in section, the working parts being illustratedin their uppermost position, the view being otherwise similar to thelower portion of Figure 21.

Fig. 23 is a section on the line XXIII-XXIII of Figure 21.

Fig. 24 is a fragmentary sectional view similar to the lower portion ofFigure 23 but with the working parts shown somewhat raised from theirlowermost position.

Fig. 25 is a section similar to Figure 23 but with the working partsshown in their uppermost position.

Fig. 26 is an elevation of a nail blank for use in my novel machine, and

Figs. 27 and 28 are perspective views of a partly formed nail and afully formed headed nail respectively.

As shown in Figure l, the machine of the present invention comprises apedestal I, including an upper housing 2, in which the shafts 5 and 9forming part of the actuating means for the machine are enclosed, and atable 3, adjustable as to height, as by means of hand-wheel 4 andadapted to support the work-pieces to be nailed together (not shown).

As will readily be appreciated in the course of the followingdescription, the precise form and construction of the pedestal I and themanner of mounting the actuating shafts and the actuatedinstrumentalities thereon is of little importance as regards the presentinvention and the pedestal and method of mounting illustrated anddescribed are merely illustrative.

' The actuating means comprises a main shaft 5 adapted to be powered asby means of a pulley 6, intended to be driven in the usual way bybelting (not shown) from a suitable source of power, said main shaft 5being positively coupled as by gears 1 and 8 to a counter-shaft 9.

The end of the shaft 5 remote from the pulley 6 extends through a frontwall I0 of the upper housing 2. Detachably positioned against said frontwall I is a cross-head chamber II, said chamber being detachably securedto said upper housing 2, as by screws Illa passing through a flange IEIbsurrounding said front wall I0. Chamber II is open at both its ends and,at the end opposite the wall I0, there is provided a detachable coverplate I2 adapted to be removably secured to said chamber as by means ofscrews I3, only a fragment of said cover plate being shown in Figur-e 1.The entire cover plate is best seen in Figures 2, 23 and 25, which showthat the cover plate comprises a body portion I4, from one face of whichprojects a raised marginal portion I5, having plain holes I6 therein toadmit of the passage of said xing screws I3.

Returning now to Figure 1, the open end of the chamber has a flat marginI1, adapted to slide strucbe engaged by said raised marginal portion Iof the cover plate, and said margin I1 is provided with drilled andtapped holes I8 adapted to receive said fixing screws I3.

The chamber I I is dened by a peripheral wall I9 extending around thebottom and two sides of said chamber, the inner face of which is steppedas shown at (see also Figs. 21 and 23) to provide an upper, widercompartment 2I and a lower, somewhat narrower compartment 22. Theaforesaid end of the main shaft 5 extends into said upper compartment,and has fast on it a crank member 23, comprising a crank plate 2.4, fromwhich projects a crank pin 25.

Similarly, the end of counter-shaft 9 remote from the gear 8 extendsthrough the wall I0 into the lower compartment 22 of the chamber II, andhas fast thereon a platelike crank body 26, of a secondary crank 21comprising a crank pin 28 projecting from said crank body.

The opposite vertical portions of the peripheral wall I9 of the chamberII are recessed on their inner faces to provide a pair of upperslideways, 29, 29a, (see Fig. 21), only one of which is shown at 29 inFigure 1, and a pair of lower slideways 30, 3|, best seen in Figure 21,one of which, 30, can also be seen in Figure 1. It will be understoodthat the upper slideways are in the wall portions corresponding to theupper compartment 2I and the lower slideways are in the wall portionscorresponding to the lower compartment 22.

An upper cross-head 32 is disposed in the upper compartment 2I withopposite ends slideably engaging the upper slideway 29 and thecomplementary slideway 29a therefor (see Fig. 21), so that uppercross-head 32 is adapted to slide up and down in said upper compartment,and to be actuated for such sliding motion by the upper crank pin whichextends into an elongated slot 33, provided in the upper crosshead 32and disposed transversely of the upper compartment 2|.

Depending centrally from the lower portion of the upper cross-head 32 isa hammer bar 34 which extends downwardly through the lower compartment32 into a reciprocable slide member 35 in a manner and for a purpose tobe hereinafter explained. In Figure 1 the hammer bar 34 is shown brokenso as to expose the lower crank pin 28.

In the lower compartment 22 of the chamber II there is similarly locateda lower cross-head 36 having a slot 31 into which lower crank-pin 28extends, opposite ends of said lower crosshead being slidably disposedin the slideways and 3|. Said lower cross-head 33 forms a part of saidslide structure which is adapted to extend into the lower compartment22, through an opening 38 provided in the lower wall 39 of the chamberII, whereby the upper portion of the slide structure 35 is adapted to beraised into said lower compartment 22 when the lower cross-head 33 movesupwardly in the slideways 30 and 3I as will be hereinafter explained.

The lower cross-head 36, crank 21 and counter shaft 9 thus formactuating means for the slide structure 35, and the upper cross-head 32,crank member 21 and shaft 5 form separate actuating means for the hammermeans 34 to reciprocate the same in timed relationship with thereciprocation of the slide structure 35.

The lower portion of the slide structure 35 is adapted to reciprocate ina guide block indicated by the general reference numeral 42 which isalso detachably secured to the housing 2 of the pedestal I. To this endthe flanges Ib surrounding the end wall I0 have downwardly directedextensions 40 which, as seen at 4I in Figs. 23,- 24 and 25, are offsetto the rear, that is towards the pulley 6, to allow for the greaterwidth of the guide block.

As indicated in Figure 1 both the chamber II and the guide block 42 areconveniently secured to the anges Ib and 40 of the housing 2 as by meansof fixing screws some of which are shown at Ia and 43 passed throughsaid flanges from the side thereof nearest to the pulley 6 and thusscrewed into the back of chamber II and guide block 42.

From the foregoing description it will have been noted that the uppercompartment 2I is defined only by the corresponding portions of the wallI9 which extend only along opposite sides of said compartment, and ofcourse, when the chamber II is assembled to the upper housing 2, also bythe front wall I0 and the cover plate I2, so that as so far describedsaid upper compartment is open at the top. The top of the compartment 2|which is also the top of the chamber I I is covered over by a detachabletop plate 44 which may be secured in position to bridge opposite sideportions of the wall I9, as by screws 45. The reason for thisconstruction is to enable the upper crosshead 32 to be inserted into theslideways 29, 29a when assembling the parts. It is preferred to assemblefirst the reciprocable slide structure 35, except for certainaccessories as will hereinafter appear, then to assemble said slidestructure with the guide block 42, and thereupon to introduce the upperportion of the slide structure 35, including of course the lowercross-head 36, into the chamber I I through the lower opening 38. If thehammer bar 34 is detachably mounted to the upper cross-head 32, as willhereinafter be explained, said hammer bar may be introduced into saidchamber I I through the bottom together with the upper portion ofreciprocable slide structure 35. Supposing the top plate 44 to have beenremoved from the wall I9, the upper cross-head 32 may be inserted fromabove into the slideways 29, 29a, and, if necessary, coupled to thehammer bar 34. The top plate 44 is then secured in position and thewhole of this assembly comprising the chamber II, cross-heads 32, and36,

reciprocable slide structure 35 and guide block r ft2, may, afterfitting of any previously omitted accessories, be secured to the flangesIllb and 40 of the upper housing 2, during which operation the crankpins 25 and 28 may readily be inserted into the corresponding slots 33and 3l. Whereupon the coverplate I2 may be secured to the front ofchamber II.

Referring now to Figures 3, 4 and 5, the guide block 42 comprises a mainchannel shape body member 46 secured, as hereinabove described, to theupper housing 2 so that the open side of the central channel 41 is free.The width of said channel 4l is such as to allow the lower portion ofthe slide structure 35 to slide freely therein, but the depth of thechannel 47 is less than the thickness of said slide structure so thatthe latter projects beyond the end faces 48 and 49 of the legs 53 and 5Irespectively of said body member 45. The difference between the depth ofthe channel 4l and the thickness of the lower portion of the slidestructure 35 is taken up or compensated by two bridge members 52 and 53,which are interposed respectively between the legs and 5I and aretaining plate 54, which retaining plate extends the full width andheight of the bodymember 46 as is seenin Fig. l. 'The assembly composedof the parts 46, 52, 53. and 54 is secured together as a guide block asby means of screws 55 passing through the retaining plate and throughholes, such as the holes 55; in the bridge members and engaginginternally threaded holes, such as the holes 5l, in the end faces 48 and49 of the legs 50 and 5I.

Turning now more particularly to Figures 4 and 5, the bridge members 52and 53 are of a generally similar structure and comprise a recess, inthe bottom wall of which a cam groove is provided. However, the recess58 of the bridge member 52 is relatively long and deep and defines tworelatively narrow legs 59 and 60 of which the latter is the narrower,said legs being located at the extreme ends of bridge member 52. The camgroove 6I at the bottom of the recess 58 of bridge member 52 comprises alower straight portion 62, an upper straight portion 63 oiTset withrespect to said lower portion but parallel thereto, and one intermediateinclined operative portion 64. As seen in Figure 4 said lower portion 52of the cam groove BI is offset to the bridge member 52 is in anassembled position said lower portion 62 will lie on the side of thevcentre line of said upper portion 63 remote from the slide structure 35.Since the parts are to be regarded in their assembled relationship,locations remote from the slide structure 35 (such as that of said lowerportion 62 of the cam groove 6i), will be hereinafter referred to asoutward locations, and movements away from the slide structure will bereferred to as outward movements. Similarly, locations nearer to theslide structure 35 and motions towards the latter will hereinafter bereferred to as inward locations and inward motions respectively. Theseterms outward and inward will be employed in the same sense with respectto all sides of the slide structure 35, so that outward motion (orposition) refer-red to one side will be in the opposite direction orperpendicular to, outward motion referred to another side, and similarlyfor the inward motion (and positions).

The bridge member 53 seen in Figure 5 ecmprises a relatively shallowrecess 66 defining an upper relatively narrow foot 5l and a lowerrelatively long bearing portion 68. In the bottom of the recess 66 is acam groove 69 comprising a lower outwardly located straight arm 10,parallel to the longitudinal centre line of bridge member 53 and anintermediate inwardly inclined arm ll and an upper arm I2 parallel tothe lower arm 'ill and offset inwardly of the latter.

As seen in Figures 3, 21 and 22, in the end face 4S of the leg 5l! ofthe channel shape body member 45, to which end face the bridge memberI52 (Fig. 4) is adapted to be applied, there is provided a contouredrecess 'Z3 dened by a peripheral guide wall 14, which, on the inwardside of the recess, comprises a straight portion l5 parallel to thelongitudinal center line of said end face 43, and on the outward sideincludes lower and upper straight end portions 'I6 and Il respectively,best seen in Figures 21 and 22, which are parallel to the straightportion 'I5 nected by an outwardly arcuate intermediate portion 73. Theoutward and inward portions of the peripheral wall 'I4 are connectedtogether by lower and upper arcuate end portions 'I9 and 83.' Secured tothe outside of the aforesaid leg 5I)A and in a position to cooperatewith the guide wall 'I4 as will hereinafter be explained, is a cam stripthe left of the upperA portion 53, but it will be appreciated that whenvand are con-v I comprising an inwardly lying straight meinber 82parallel to the stra-ight portion 15 of the guide wall 14 and located inclose proximity to the side face 83 of said leg 50. The cam str-ip 8|further comprises an outward member 84 the shape of which is generallysimilar to the contour of the outwardly lying portion of the guide wall14, so that said outward member comprises lower and upper straightsegments 85 and 86 connected together by an outwardly arcuateintermediate segment 81, and an inclined resilient end guide segment35a, the free end of which normally rests against the outer face 83 ofthe leg 50. The total length of the cam strip 8|, that is the overalldistance from the free end of the end guide segment 85a to the oppositeend o-f the upper segment 86, is slightly less than the overall lengthof the contoured recess 13, that is to say, than the distance betweenthe lower and upper end portions 19 and 60 thereof, for a purpose whichwill become apparent hereinbelow. As shown in Figure 3 the cam strip 3imay be secured to and spaced from the outer face 83 of the leg 50 bymeans of an attachment strip 68 and screws 89, and conveniently thestraight member 82 may be integral with said attachment strip and extendlaterally therefrom.

The guide block considered as a whole, has therefore a slot, hereinaftercalled heading slot, in one side and an elongated opening in theopposite side, said slot and opening being defined in the embodimentshown by the respective recesses 66 and 58 of bridge members 53 and 52,and the part of the end faces of the respective legs 5| and 50 bridgedthereby. As will afterwards appear there is a further slot to be calledmagazine slot in the same side of the guide block as the heading slot,and a feeder slot in the rear wall of the guide block as now about to bedescribed.

As seen in Figures 6, 17, 23, 24 and 25, the rear wall 90 of the channelshape body member 46 has 'a slot 9| formed therein and extendingtherethrough, said slot being substantially centrally disposed in saidrear wall 90 and extending as regards its major dimension parallel tothe longitudinal center line of said body member 46. Said slot 9| isadapted to receive complementary blocks 6 in Iand 9 ib having each aoountersunk side face 92a and 62D (see Figs. 6 and 17). As best seen inFigs. 6, 23, 24 and 25, in at least one of said side faces, for examplethe side face 92a, there is provided a bifurcated cam groove G3, hav-ingan upper straight trunk portion 94 which is in alinement with a lowerstraight branch 95, and an arcuate branch S6, extending from an inwardlyinclined transfer branch 06a, inwardly and upwardly to join the trunkportion 94, said transfer branch extending from the lower end of thearcuate branch 66 outwardly and upwardly to meet the lower end of thelower straight branch 95. rrhe trunk 94 and straight branch 05 of thebifurcated cam groove are disposed parallel to the longitudinal centerline of the side face 92a. The arcuate branch 66 is so arranged that itextends from the trunl; S4 and straight branch 05 towards the open sideof body member 46. It will be understood that the straight and arcuatebranches '05 and S6 of the cam groove 93 define between them an islandportion 92e.

The complementary blocks Qld and SIb are adapted to be removably securedin position in the slot 9| as by means of screws 91, and define betweenthem a feeder slot 9|c.

With reference in general to the cam grooves and contoured recess andthe like, hereinabove described. it should be pointed out that, althoughthe general features thereof must be substantially as described, theactual design or proportion of the constituent parts and hence, thefinal appearance and dimensions of such groves and recesses, will dependto a certain extent on the size and relative proportions of the othercomponent parts of the mechanism and also upon the size of the nail tobe manufactured by the machine. It will also be appreciated that theexact position of such grooves and recess in the respective machineparts, with regard for instance to their disposal about the center linesof such parts, will also to some extent depend upon the factors justmentioned. Hence, the relative locations and dimensions of such camgrooves and recesses shown in the accompanying drawings are to be takenas being merely illustrative except for the essential characteristicsmentioned hereinabove, such as comprising straight portions joined byinclined or arcuate portions. Moreover, for the purpose of more clearlyrepresenting such c'am grooves and recesses as well as the guide strip8| some dimensions have been purposely exaggerated in the drawings. Itis thought, however, that this specification contains sufficientinformation to enable anyone skilled in the art to design practicalembodiments without any difficulty,

As can be seen in Figs. 6 and 17, the other leg 5| of the body member 46has an elongated slot 98 extending heightwise of the body member andparallel to the longitudinal center line thereof, said slot beingadapted to receive a magazine member to be described hereinbelow forheightwise reciprocation in said slot.

Turning now to Figs. 6, '1, 16, 17, 23, it will be noted that thereciprocable slide structure 35 comprises a plunger body 69 having asubstantially L shape cross section. Said plunger body has an upper end|00, a rear face including an upper portion |0| and a lower portionHita, a narrow side face |02, a wide side face it and a front facecomprising an inwardly offset portion |04 and a front portion |05,between and perpendicular to which, is a transverse face |06 definingone side of a hammer guide channel |01, the outer end |08 of which (thatis the end nearest the front portion |05) is defined by a shoulder orstep |09 projecting from the front portion |05, whereas the inner end Ii0 of said hammer guide channel |01 is defined by a step i|| formed inthe offset portion.

That part of the plunger body dened by the front portion |05 and wideside face |03 may be regarded as the long leg of the L and it extendsbelow the short leg of the L defined by the offset portion |04 and thenarrow side face |02. Said short leg has a bottom face H2 on which areprovided centering pins H3, and which has a drilled and tapped hole ||4to receive a fixing screw for securing a complementary part to saidbottom face. Said complementary part will be more particularly describedhereinbelow with reference to Figs. 13, 14 land l5. As best seen in Fig,'1, near its lower end the front portion |05 of said longer leg is cutback to form a pair of spaced steps I I5, the front faces I6 of whichlie in the saine plane at a level below said front portion |05 and areprovided with screw holes ||1 so as to have secured to them a coverplate H8. The parallel faces ||9 of the steps H5, that is to say, thefaces which are perpendicular to the front portion |05 define togetherwith the inner face |20 which connects said parallel faces, a

press channel I2| adapted to be' covered by the cover plate I8 and to beopen transversely of said longer leg.

The difference in level between the inwardly offset portion |614 and thefront portion of the plunger body 99 is adapted to be compensated byAcompensation plate |22, best seen in Figs. 8, 9 and 16. Said plate hasa narrow grooved face |23, which is adapted to engage the edge of theshoulder |09, and an inner face |24 adapted to engage the inwardlyoffset portion I (I4 and to extend therebeyond for the same distance asthe lower part of the longer leg of the plunger body. In order to secureaccurate fit'- ting of the compensating plate in the plunger body, dowelmembers, such as those shown at |25 in Figs. 8 and 9, may be provided onthe compensating plate and corresponding dowel holes |26 may be providedin the inwardly offset face |04 (see Fig. 7). It is to be understood ofcourse instead of providing dowels exclusively on the plate |22 anddowel holes in the face |04, I may provide some dowels and some holes onand in each of these two members. The compensating plate |22 may bedetachably secured to the inwardly oifset face |94 as by countersunkscrews |21 4(see Figure 16) passing through holes |23 in plate |22 andinto tapped holes |29 in the face |94.

Extending lengthwise of the narrow grooved face |23 (Figs. 8, 16 and 17)is a narrow and shallow groove |39. As shown, said groove is slightlyoffset towards the inner face |24 of the compensating plate |22. At aposition in the neighbourhood of the lower end of said compensatingplate |22 to be determined by the relative locations of other parts tobe hereinafter described, I provide a stepped recess extendingtransversely of the compensating plate and comprising a narrow shallowgroove 3| extending from the outer side face |32 of plate |22 to thegroove |39. Said stepped recess further comprises a heading member guidechannel |33 of substantial width and a pair of spaced bearing surfaces|34 extending widthwise away yfrom said guide channel and adapted to beengaged by flanges |35 of a main closure plate |36 and an auxiliarycheck plate |31 (see Figs, 10, 11 and 12). The check plate |31 isadapted to be positioned on the bea-ring surfaces 34 at the ends thereofnearer the longitudinal groove |30 of the compensating plate |22 andsaid check plate is preferably of uniform cross-section. The mainclosure plate |35 has a bearing face |38, parts of which are adapted toengage the bearing surfaces |34 and has furthermore a substantiallycentrally disposed recess |39 which, in the assembled position ofclosure plate 35, extends parallel to the transverse groove |3I. Theplates |36 and |31 vare adapted to be detachably secured in position onthe bearing surfaces |34 as by means of 'screws |49 (see Fig. 21), towhich end plain countersunk holes |40a are provided in the plates I 36and |31 and tapped holes |4012 in shoulders |34 of plate |22. In theheading member guide channel |33 a heading member |4| (see Figs. 10, 16,21 and 22) is adapted to it slidably, said heading member having on oneside thereof a substantially centrally disposed raised or thick' enedportion I 42 extending lengthwise of said heading member and adapted toengage the central recess |33 of the closure plate |36. On either sideof said thickened portion member |4| are somewhat thinner flanges |43adapted toi-lt in the upper and of the heading lower narrower yheadingfinger portions of the heading member guide channel |33. On the side ofthe heading member Vremote from the thickened portion |42 I provide aheading finger |44 disposed parallel to the lon-v gitudinal center lineof the heading member and as shown to one side of said center line,sa-id |44 projecting beyond one end |45 hereinafter called the inwardend of the heading member. Said heading nger |44 is adapted to be asliding nt in the transverse groove ISI. On the same side as the headingfinger E44 but adjacent the other, outward end of the heading member 4|,is a cam follower pin |45 which is there provided for a purpose to behereinafter explained.- It should be under-, stood that the overalllength of the heading member is such that in the assembled condition theend thereof remote ,from the front face |45 projects beyond the outerface |32 of the com-l pensating plate |22, Figs. 8 and v9.

Turning now to Figs. 7, 13, 14, 15 and 16 it will be seen that theplunger body 99 as so far described still has, even after theapplicationy ofthe compensating plate |22, an unlled gap extendinginwardly from the lower portion |0|a of the rear face of the plungerbody and dened by the bottom face 2 of the shorter leg and the uncoveredportion of the lower end of the longer leg of the plunger body. To fillthis gap in the manner indicated in Fig. 16, I provide a feeder blockeral shape of which is such as to ll said gap so as to complete therectangular cross-section which the slide structure 35 has near thelowerl end thereof. Said feeder block |48 has an upper face |49 drilledas indicated at |50 positioning pins ||3 and further drilled to providea hole |5| extending heightwise right through said feeder tion of afixing screw |52. The feeder block |48 also has an inner side face |53adapted to engageI the lateral face |41 of the plunger body and recessedtransversely of the vide a feed bar to which guide channel I 54 andshoulders |55 plates |55 may be secured, as

by means of screws |51 to retain in the feed bar channel a slidable feedbar as will hereinafter be described.

The feeder block further has an inside face |58 adapted to engagetheinner face |24 of the compensating plate |22, and an outside face|59, which in combination with the narrow side face |92 of the plungerbody-99 helps to complete the contour of the sliding member 35. Formedin the inside face |58 and extending right across the feeder block |48so as to communicate with the feed bar channel |54 and to appear in theoutside face |59 is a magazine channel |63 which is laterally closed orcompleted by the engagement of the inside face plate |22.

Turning now to other accessories to be fitted into the slide structure35 and referring more particularly to Figs. 3, 16, 17 and 21, I providea magazine housing I5! adapted to t in the' magazine channel |69 of feedblock |48 (Fig. 14)

side of the feed bar channel |54 17). The magazine housing IGI wardlybeyond the outside face |59 block |48 a suncient distance to extendsoutof the feeder of the lateral face |41V |48, the gen? to receive the'block to permit of the inser feeder block to pro-v lss of the-feederblock' |48 with the inner face |24 of the compensating pass through themagazine slot 93 to the outside of the corresponding leg 5| of. the'channels'h'ape body mem-i ber 46 when all the parts are in assembledcondition and to extend slightly beyond the outward face |62 of said leg5| of the channel shape body member 46. At the outside end of themagazine housing I provide closure means such as the cover slide |63(see Fig. 17) which is kadapted to fit in channeled flanges |64 providedat said outer end of the magazine housing Within said housing I providealso a feeding spring |65 extending between sa-id cover slide |63 andthe outermost one of a plurality of nail blanks |66 contained in saidmagazine housing. On the same side of the sliding member 35 as the onefrom which the magazine housing |6| projects I provide the headingmember |4| which, as can be seen in Figs. 16 and 18 extends beyond theouter side face |32 of the compensating plate |22, and, in the assembledcondition of the parts said heading member extends into the heading slotIdefined by the shallow recess 56 (Fig. 5) of the bridge member 53pertaining to the guide block, the cam follower pin |46 of the headingmember |4| engaging the cam groove 69 in said shallow recess 66.

As seen in Figs. 3 and 7, the inner end of the magazine housing |6| liesflush not only with the side of the feed bar channel |54 but also with:3121; grooved face |23 of the compensating plate In the feed barchannel |54 which is perpendicular to the center line of the magazinehousing, I provide a feed bar |61, one end of which, namely, the onewhich in the assembled condition of the parts is nearer the magazinehousing is of reduced thickness to provide a feeder tongue |58. Thefeeder member |61, |68 has a face substantially coplanar with the innerend of the magazine housing and the open side of the groove namely theface contacting the afore-mentioned side of the feed bar channel |54,and is thus adapted to reciprocate in front of and in close engagementwith said inner end of the magazine housing |6| to feed a blank at atime towards a position in front of and in engagement with the groovedface |23 of compensating plate |22 in such a manner that the centrallongitudinal stripA of the blank overlies the open side of longitudinalgroove |30.

The opposite end of the feed bar |61 is provided with cam follower meanssuch as the camming pin |69, for instance on the same side of the feedbar as the feeder tongue, saidend of the feed bar, in the assembledcondition of the parts, extending into the feeder slot dened by thecooperating counter-sunk side faces 92a and 92h of complementary blocks91a and 91h pertaining to the guide block and so that the camming pinshall engage in the bifurcated cam groove 93.

On the side of slide structure opposite the magazine and heading member,I provide a pressing assembly |10 including a channel shape ram guide|11 and a ram |12. As shown in the drawings (Figs. 3, 17, 21 and 22) theram guide has projecting from one side of it, a guide pin |13, and onthe opposite side, has a slot |14 through and beyond which an actuatingpin |15 extends, said actuating pin being fast on said ram |12. In thearrangement shown, the guide pin |13 and the actuating pin |15 are sodisposed on the pressing assembly that the guide pin will, in theassembled position of the parts, extend into the contoured recess 13 toengage the dening walls thereof and the actuating pin |15 will extendinto the cam groove 6| of bridge member 52 (Fig. 4) which, it will berecalled, is applied to the leg point in the operation of the device.

of the channel shape member 46. Furthermore, the pressing assembly isadapted to reciprocate in the press channel |'2| provided in the lowerportion of the plunger' body, the arrangement being such that the ram|12 is alined with the open side or longitudinal groove |30 in thecompensating plate |22, and the ram and ram guide move perpendicularlyto the common plane of the inner end of the magazine or open side ofgroove |30.

The ram |12 is an accurate sliding fit between the legs |16 of thechannel shape ram guide |1| and is of a width substantially equal to thewidth of the longitudinal groove |35 less twice the thickness of a nailblank, so that the ram can cooperate with said groove to press a nailblank into the groove as will hereinafter be described to perform onestep in the nailforming operations. Since the ram |12 is an accuratesliding lit in the ram guide |11, it follows that the end edges |11 ofsaid ram guide (see Fig. 3), at the inward end thereoi:` will overlapcorresponding edges of the longitudinal groove to the extent of onethickness of a nail blank, so that if, after a blank has been forced bythe ram |12 into the longitudinal groove |30 iii such a manner that whatwere previously the longitudinal side edges of the flat nail blank areush with the grooved face |23 of the compensating plate |22, the ramguide is advanced to engage said grooved face, said end edges |11 willact to hold the partly formed blank securely in said longitudinal grooveeven if the ram is retracted therefrom.

The ram guide |1| has secured to the outward end thereof a transverselydisposed camming member |13 having upper and lower bevelled cammingedges |19 and |80 respectively. The lower bevelled edge is disposed onthe outward side of the camming `member |18 and is adapted to coact withthe end guide segment a of the cam strip 84 secured to the leg 50 of thechannel shape body member 46, to raise said guide segment 85a from theside face 83 of said leg 50 to permit the camming member |18 to passbetween said end guide segment 85a and said face 83 at a certain As willhereinafter be explained, said lower camming edge |80 is also adapted tocoact with the upper end of the cam strip 8| to guide the camming member|13 into the space between the straight member 82 of the cam strip 8|and said side face 03, as will also be hereinafter made clear.

The upper bevelled camming edge |19 is disposed on the inward side ofthe camming member |18 and is adapted to cooperate with the outward faceof the end guide segment 85a to assist in guiding the camming member |18onto the outward face of the outward member 84.

Referring now to Figs. 19, 20 and 21, the slide member assembly furthercomprises a hammer bar 3d of cross-section such that it will be a goodsliding iit in the guide channel |01. The upper end of said hammer bar,as has already been indicated, is secured to the upper cross-head 32.

As best seen in Figs. 21 and 23, for example, and as shown, the hammerbar 34 is detachably secured to a forwardly extending projection 32aprovided on the lower edge of the upper crosshead 32 and so positionedthat the hammer bar 34 when secured in place and when the whole of theoperating parts are assembled, will be in strict alinement with groove|01 (Figs. 7 and 25).

The hammer bar 34 may be xed to the projection 32a as by bolts 32h andnuts 32e.

At its other end and on one side of the hammer bar I provide a hammermember |81 of cross-sec- I3y tion to be a good sliding iit in thelongitudinal groove |30 of the compensating plate |22, and substantiallyof the same cross-sectional area.

As already indicated the lower cross-head 33 forms part of thereciprocable slide member 35 and to this end is preferably secured to orformed integrally with the upper end of the plunger body 3 and islocated to the rear of said upper end so that in the assembled conditionof the machine the hammerv bar 33 may reciprocate in front of the lowercross-head 33 without fouling.

The machine, as so far described operates as follows, particularreference being had to Figs. 3, 17, 18 and 21 through 25. In Figs. 3, 21and 23 the parts are shown in their lowermost position and in Fig. 3 Ihave shown the magazine housing I6! empty as if the machine were aboutto be used for the iirst time. lt will 'be noted that with the parts inthe position shown in Figs. 3 and 21, the hammer bar 34 is also in itslowest position with the hammer member |8| extending to the bottom ofthe groove |30 of compensating plate |22. The heading member |41 and thefeeder tongue |53 are in the outward or retracted positions whereas thepressing assembly |10 is in its inward or advanced which, however, theram |12 is in retracted position with respect to the groove |33. Thecamming member |18 is just below the end guide segment 35a of the camstrip 3|, with the upper bevelled camming edge |13 in engagement withthe outer face of the lower end of the end guide 85a. For clarity it maybe mentioned that the cam follower pin |43 of the heading member i4! andthe actuating pin |15 of the ram |12 are, in the positions shown inFigs. 3 and 2l, at the bottom of the lower arm 1d andthe lower portion32 respectively of the cam grooves 3S and 6| in bridge members 53 and52. The guide pin |13 of the channel shape ram guide |1| is similarly atthe bottom of the lower portion 13 oi the contoured recess 13 and, asseen in Fig. 21, the camming pin |69 of the feed bar |31 (see Figs. 6and 17) is at the lowest point of the bifurcated groove 93 (Fig. 23).This lowest point coincides with the juncture of the inclined branch 36aand the arcuate branch 33 so that the camming pin 69 is in a position tofollow the arcuate branch 33 rather than the straight branch 95 whensubsequently moved upwardly with respect to said bifurcated groove.

It will now be supposed that the magazine housing |E| is loaded with acharge of blanks and Kclosed at its outer end with the |33 as shown inFig. 1'?. is in position the inmost blank 33a (see Fig. 23) will bepositioned opposite the inward end of the feeder tongue |38 (see alsoFig. 17) and substantially in engagement therewith. It may here beremarked that the section of the lower portions of Figs. 23, 24 and 25has been taken in the plane of the surface of the hammer bar 34 adjacentthe inward end |23 of the compensating' plate |22, which inward end |23lies in a common plane of contact with said surface. The section of thelower portion of Figs. 2, 22, hasbeen taken on a plane defined by thesurface of the ram |12; leg 50 of the chan-- remote from the end 38 ofthe nel shape member 32 of the guide block assembly, which planeincludes the corresponding surfaces of the hammer member |3| and theheading iinger |44 except for the thickness which thickness has. howevertaking the section. With the been neglectedy in dimensions chosen,

spring |35 in' position between the rearmost blank and the slidel .assoon as the charge of a nail blank,

position, in

ssl

this section plane also passes just-tothe outside of the cam followerpin |43 of the headingmember |4| so that bridge member 53 is also insec-v tion in a plane coinciding with the bottom cam groove 69, but thesection plane willextend bee tween the bottom of recess 33 of the otherbridge member 52 and the face 33 of the leg 5|).

Referring now also to Fig. 1 and supposing that after loading of themagazine a work piece to be nailed has been placed on the table 3 belowthe guide block assembly 42, if the pulley 6 is caused to rotate, themain shaft 5 will be rotated and thereby, for the reasons already setforth, cause rotation of counter-shaft 9 an-d the crank member 23 andsecondary crank 21. Rotation of crank member 23 will, by raising uppercrosshead 32 retract the hammer bar 34 and hammer member |3| withrespect to the recipI rocable slide member 35 inasmuch as the throw ofthe crank member 23 is greater than the throw of the secondary crank 27,so that the upper crosshead 32 will be displaced upwardlyand thereafterdownwardly also, at a greater rate than the lower crosshead 33 and alsoto a greater extent. Hence, there will be relative movement between thereciprocable slide member 35 and the iixed guid block assembly d2 byreason of the motion of the lower crosshead 36 and also relative motionof the hammer bar and hammer member with respect to the reciprocableslide member 35.

During the upward motion of the upper crosshead 32, therefore, thehammer member |8| will be retracted in the groove |33 (Figs. 3 and 21)and the parts are so proportioned that when the crank member 23, and,therefore, also the upper crosshead 32, has reached the top of itsstroke, the hammer member |8| will have been retracted upwardly for adistance equal to at least the full height of a nail blank.

At this juncture and with reference to Figs. 26 through 28, it may beexplained that the nail blanks 66 I use are in general of a rectangularshape having, a lower pointed end |32 and at their upper end aprojecting appendage |83 1ying in the general plane of the blank anddisposed centrally of its widthwise dimension, said appendage beingintended to provide a head after being bent over as will hereinafter bedescribed. The width of the appendage |33 is such that it will nt intothe longitudinal groove |33 of the compensating plate |22 and theinclinededges |33a forming the pointed end |32 are long enough to extendinto marginal portions |84 of the blank which marginal portionsthemselves extend lengthwise of the blank on either side of a centralstrip |35 of width to nt into said longituinal groove |33. nail blank isfrom |32 to the extreme the extreme end of the point end or theappendage |83.

Continuing now with the description of the op-` eration of the machine,and with reference to Figs. 21 through 25, it will inasmuch as the faceof the hammer member |8| which is exposed when said hammer member is ingroove |33, is ush with the inward end face |23 of the compensatingplate |22, the presence of the hammer member |3| in the lower portion ofthe groove |30 will Considering now more particularly-the lower Hencethe full length of the- ?-be observed that,

not affect the positioningagainst said inward end face |23, of a nailblank, and it is required that the hammer member |8| crosshe'ad 36 whichis connected to or forms part of the reciprocable slide member 35, itwill be noted (Figs. 22 and 24) that upward movement of lower crosshead36 will cause upward movement of the slide member 35 to displace the camfollower pin |46, the camming pin |69 and the guide pin |13 and theactuating pin |15 in their respective cam grooves, bifurcated groove andcontoured recess to actuate the associated parts. Owing to thehereinbefore described shape of the grooves and recesses, during thefirst part of the upward travel of the slide member 35, the cam followerpin |46 and the actuating pin |15 will move only upwardly along thelower portions 16 and 62 respectively of cam grooves 69 and 6| so thatthere will be no inward or outward displacement of either the headingmember |4| or the ram |12. The channel shape ram guide |1| will almostimmediately begin to move outwardly by reason of the engagement of theupper bevelled camming edge |19 of the camming' member |16 with theinclined end guide 85a to bring the guide pin |13 into engagement withthe lower straight portion 16 of the outward lying part of the guidewall 14 of the contoured recess 13. The ram guide |1| will therefore beretracted with respect to the longitudinal groove and the inward endface |23 of compensating plate |22, to permit the passage into positionin front of said groove of a nail blank.

At the commencement of the upward motion of the slide member and withreference to Fig. 23, the feed bar |61 and feed tongue |63 are in such aposition, slightly advanced inwardly from their outermost position (inwhich the camming pin |69 is in engagement with the straight portions95, 94 of the bifurcated groove 93) that the inward edge |86 of thefeeder tongue |66 just engages the outer edge of a nail blank |66a whichhas been fed forward by the action of spring (see Fig. 17) against thelateral face |41 of the lower portion of the plunger body 99. In Figs.23, 24 and 25 the plane of section passes just in front of the inwardend of the magazine housing |6| so that the nail blank |6611 engaged bythe inward edge |86 of the feeder tongue |68 is visible. Since thecamming pin |69 is, as hereinabove explained, in a position, at the verycommencement of the upward movement, such that it will follow thearcuate branch 96 of the bifurcated groove 66, upward movement of thereciprocable slide 35 will cause inward movement of camming pin |69 tomove the feed member |61 inwardly to push the nail blank |66 towards thelongitudinal groove |36, that is to say towards a position in which thecentral strip of said nail blank |66a is in alinement with the inwardend of the ram |12. This final position is shown in Fig. 24.

Continued upward motion of the reciprocable slide 35, will bring theactuating pin |15 of the ram |12 (see Figs. 3, 4 and 5) into theinwardly inclined portion 64 of the cam groove 6| and also brings camfollower pin |46 of the heading member |4| into the inwardly inclinedportion il of the cam groove 66 and causes the guide pin |13 of the ramguide |1| to approach the arcuate portion 16 of the contoured recess 13.Said guide pin |13 is held in engagement with the outvv'ardly lying wallportion of the contoured recess 13 by the action of the camming member|18 as it rides over the outer face of the cam strip 6|.

Movement of the actuating pin |15 and the cam follower pin |46 in theinclined portions compensating plate of their respective cam slots,causes the ram |12 and the heading member |4| to be advanced inwardly sothat the inward ends thereof approach from opposite sides thelongitudinal groove |36, the heading finger |44 of the heading member|4| moving along the transverse groove |3| as can readily be appreciatedfrom an inspection of Fig. 3.

The parts are so proportioned that when the inward edge of the ram |12is about to engage the central strip of the nail -blank positioned asalready described, the camming member |18 will commence to move over thearcuate segment 81 of the camming strip 8| so that the guide pin |13will commence to move along the arcuate portion 18 of the contouredrecess 13 to retract the ram guide |1| from the nail blank.

It is to be understood that when the feeder tongue |68 feeds the strip|66a into position in front of the groove |36, the ram guide |1| hasbeen retracted by the action of the end guide segment a justsufficiently to allow said nail blank to pass between the inward end ofthe ram guide and the inner end face |23 of the |22, so that the ramguide |1| will act, until retracted, to maintain the nail blank |66aagainst said inner face |23. It will also be appreciated, particularlyfrom Figs. I and ,17, that outward movement of the nail blank |6601.beyond the groove |36 is limited by the overlap of the inner end of thecover plate I8 beyond the lateral face |41 to the extent of bringingsaid inward end to the same level as the step and the shoulder |69.

During the aforesaid continued upward movement of the reciprocable slide35, the camming pin |66 of the feeder member |61 will move in theoutwardly directed part of the arcuate branch 66 of bifurcated groove 93(compare Figs. 23, 24 and 25) to cause retraction of said feed memberfrom the nail blank |66a and to thereby gradually uncover the inwardendof the magazine housing |6I.

As the reciprocable slide 35 further continues its upward motion, theram |12 will be advanced by movement of the actuating pin |15 in theinclined portion 64 of cam groove 6| (Fig. 4) to force the central stripof the nail blank |66a into the longitudinal groove |36 (Fig. 22)whereby the lateral margins of said blank are bent away from the innerface |23 of compensating plate |22 and towards the ram guide |1|, which,during this part of the operation, is rapidly moved by the arcuatesegment 81 of camming strip 8| and arcuate portion 18 of contouredrecess 13 respectively, to its outermost or fully retracted position, soas to allow said lateral margins of the nail blank to be bent up asdescribed.

Comparing Figs. 4 and 5, it will be noted that the upper straightportion 63 of the cam groove 6| is longer than the upper straightportion 12 of the cam groove 69, so that the ram |12, the actuating pin|15 of which travels in the cam groove 6|, will reach its inmost orextreme advanced position in which it completes the first of the twonail forming steps, before the inner end of the heading finger |44 ofthe heading member |4| (the cam follower pin |46 of which travels in thegroove 66) reaches its inmost or head forming position. It will also be.noted that because of this timing relationship, the ram |12 (Fig. 22)will remain in its fully advancedposition while the heading finger |44moves into and out of its respective. fully advanced position, wherebythe upper end of the ram |12 acts as an anvil over Awhich the appendage|83 ofthe nail blank may be bent by the heading nger |44. This secondand final nail forming operation, namely the bending over of saidappendage to .form a nail head, is effected as the ram and headingfinger Il!!! reach their uppermost positions (see Fig. 22).

During the rst and second nail forming steps. the feeder member |61 willhave'been moved by engagement of its camming pin |69 with the trunkportion 94 of the bifurcated groove et, into its outermost or fullyretracted position shown in Fig. 25 so as to clear the innerl end of themagazine housing itl, and thereby allow another nail blank |66?) to beadvanced by the spring |65 against the lateral face lli-1 of the plungerbody 99, in position to be moved opposite the longitudinal groove |36 atthe commencement of the next cycle of operations.

It will be appreciated that when the various cam follower and actuatingpins have reached their 'uppermost positions the reciprocable slide 35and also the crossheads 36 and will have reached their uppermostpositions, so that at f the same time the hammer bar 34 will likewisehave been raised to bring the hammer member |8| into fully retractedpositie in which its lower end, as indicated in Fig. 2 is just above theinward end of the heading finger Mii when the latter is infully-advanced position.

With the parts in the mutual relationship just described, they are readyto commence the downward or return stroke. Continued rotation of themain shaft 5 will therefore initiate the return stroke during which thethe heading member mi will move downwardly in cam groove 12 and 1E fromthe position shown in Fig. 22 to the position shown in Fig. and theactuating pin |15 of the ram |12 will move downwardly in cam groove 5|to be eventually retracted into their outermost positions, from theposition shown in Fig. 3 to the position shown in Fig. 21, as willreadily be understandable from the drawings.

The camming pin |69 (Fig. 25) of the feeder member |61 in moving downwill follow the straight trunk 94 and the straight branch 95 of thebifurcated groove 93, thereby retaining the cam follcwerpin Ult offeeder member |61 in outermost or fully retracted position until, nearthe end of the downstroke the camming pin |69 engages the inwardlyinclined branch 96a of the bifurcated groove 93 to` move the feedermember |61 inwardly to bring the inward edge |86 of feeder tongue |60into engagement withV a new blank such as the blank|66a Fig. 23.

Considering now the ram guide |1|, it should be noted that towards theend of the upstroke of reciprocable slide 35 (Fig. 22), said ram guide|1| is moved inwardly by the action of the inwardly curved part ofarcuate portion 18 of the guide wall 14 on the guide pin |13, the'camming member |18 being thus caused to ride over the correspondingparts of the guide strip 8|. The parts are so proportioned that theinward end of the ram guide |1| will be moved into engagement with theinner face |23 of compensating plate |22 to hold the partly formed nail,and also the same nail after being fully formed, in the longitudinalchannel |30 by the overlap of the inner ends of the ram guide over theedges of said longitudinal hereinabove explained. The ram guide movesinto said engaging position when th Vguidi? Dingroove |30 ias upperextremity of the con'- commencernent of the downward movement at thereciprocable slide35, the camming member |10 will be deflected inwardlyby engagement of said'edge |80 with the upper parts of saidl cammingstrip 8|. whereby the camming member 18 is positioned to move along-thespacebetween the side face 83 of the channel shape member 46 andthe-straight portion 82 of said camming strip 8|, to maintain the ramguide |1| in its fully advanced-or inmost position during-the whole ofthe downstroke. In this manner the overlap of the inward end of the ramguide- |1| over the longitudinal groove |30 will assist in maintainingthe nail in said channel after retraction of the ram and during theeffective stroke of the hammer bar 8| to be described hereinbelow.

Shortly after commencement of the downstroke, the actuating pin |15 ofthe ram |12 will enter the inclined portion 64 of the cam groove 6|(Fig. 4), and travel of said actuating` pin |15' along the inclinedportion will cause retraction of the ram |12 (Fig. 17) toits outermostpositioninwhich it is quite clear of the groove |30 and the thereincontained fully formed nail.v At the same time, the heading finger |144will have been retracted from heading position so as to allow thehammervmember |8| to descend and engage the head of the nail under theaction of the descending upper crosshead 32, the parts being soproportioned that engagement of the hammer bar |8| with the nail headwill take place immediately after the heading finger |44 and the ram |12have been retracted sufliciently to be out of the way.

As the hammer bar 34 descends the hammer member |8| moves downwardly inthe groove |30 driving the fully formed nail before it and` out throughthe bottom end of said groove (Fig. 21). If, as previously supposed, aworkpiece is positioned underneath the guide block assembly the hammerybar |8| willrdrive the nail into the workpiece to effect a operation iscompletedfwhen the hammer bar and the two crossheads 32 and 36 reach thebottom of their strokes, which -position is illustrated in Figs. 1 and 3(and 21). The parts willthen be in a position to repeat the cyclealready described.

While there have been shown and described and pointed out thefundamentalnovel features of the invention as applied to certain preferredembodiments, it will be understood that various omissionsandsubstitutions and changes in the formand details of l1. A nailmakingand nailing machine adapted toform` nails from sheet-metal blanks and todrive -the for-med nails out under hammer acof said upper nailingoperation. Said l tion, said machine comprising a guide block. aA slidemember reciprocably mounted in said guide block, a magazine for nailblanks including an inner end, secured in and carried by the slidemember, a longitudinal groove in the slide member, said groove having anopen side, feeding means reciprocably mounted in the slide member andhaving a face movable substantially in a plane common to the inner endof said magazine and the open side of said longitudinal groove, rammeans reciprocably mounted in the slide member and positionedperpendicularly to said plane and opposite said open side, hammer meansin said groove and reciprocable lengthwise thereof, actuating means forsaid slide member, actuating means for said hammer means, said hammeractuating means being coupled to said actuating means for the slidemember, and actuating means for said feeding means said slide member inthe guide block causes a nailblank to be fed into position in front ofthe groovel and the ram means to press such blank into the groove toeffect a nail forming operation, whereupon said hammer means is causedto drive the formed nail along and out of said groove.

2. A nailmaking and nailing machine adapted to form nails fromsheetmetal blanks and to drive the formed nail out under hammer action,said machine comprising a guide block having a central channel, a rearwall and a pair of opposite sides, said channel being parallel to saidrear wall and said sides, a feeder slot in said rear wall,

a magazine slot extending through one of said In' sides, an elongatedopening in the other side, a slide member mounted in said channel forreciprocation therein, a magazine housing for nail blanks including aninner end secured in and carried by said slide member, said magazinehousing extending into said magazine slot, a longitudinal groove in saidslide member, said groove having an open side, feeding meansreciprocably mounted in the slide member and extending into said feederslot, cooperating means on said feeding means and in said ing saidfeeding means, the feeding means having a face movable substantially ina plane common to the inner end of the magazine housing and the openside of the longitudinal groove, a pressing assembly reciprocablymounted in the slide member and extending into said elongated opening,cooperating actuating means in said pressing assembly and in saidopening for reciprocating said pressing assembly, hammer means in saidgroove and reciprocable lengthwise thereof, slide actuating means forsaid slide member, and actuating means for said hammer means, saidhammer actuating means being coupled to said actuating means for theslide member, whereby movement of said slide member in the guide blockcauses a nailblank to be fed by the feeding means from the inner end ofthe magazine housing to a position in front of the longitudinal grooveand the pressing assembly to press said blank into said groove to effecta nail forming operation, whereupon said hammer means is actuated todrive the formed nail along and out of the groove.

3. A nail making and nailing machine adapted to form nails fromsheet-metal blanks and to drive the formed nail out under hammer action,said machine comprising a guide block having a central channel, a rearwall and a pair of opposite sides, said channel being parallel to saidwall and sides, a feeder slot in said rear wall, a magaand ram meanswhereby movement of a feeder slot for reciprocatlongitudinal groove inzine slot extending through one of said sides, a' elongated opening inthe other side, slide member mounted in said channel for reciprocationtherein, a magazine for nail blanks including an inner end, secured inand carried by the slide member, said magazine housing extending intosaid magazine slot, a longitudinal groove in said slide member, saidgroove having an open side, feeding means mounted in the slide member,the feeding means extending into said feeder slot and having a facemovable substantially in a plane common to the inner end of saidmagazine housing and the open side of said groove, cam means in saidslot and on said feeding means arranged to cause reciprocation of saidfeeding means in the slide member, to thereby cause a nail blank to befed from said inner end into a position in front of said open side ofthe groove, a pressing assembly reciprocably mounted in the slide memberand extending into the elongated opening, said pressing assembly beingperpendicular to said common plane, cam means in said opening and onsaid pressing assembly arranged to reciprocate the pressing assembly inthe slide member to cause a blank positioned in front of said groove tobe pressed thereinto to be formed into a nail, slide actuating meansarranged to cause reciprocation of said slide member in the guide block,and actuating means for said hammer means arranged to causereciprocation of the hammer means in the slide member in timedrelationship with tre reciprocation of the slide member.

4. A nailmaking and nailing machine adapted to form nails fromsheet-metal blanks and to drive the formed nails out under hammeraction, said machine comprising a guide block, a slide memberreciprocably mounted in said guide block, a magazine for nail blanksincluding an inner end, secured in and carried by the slide member, a

the slide member, said groove having an open side, feeding meansreciprocably mounted in the slide member and having a face movablesubstantially in a plane common to the inner end of said magazine andthe open side of said longitudinal groove, heading means reciprocablymounted'in the slide member and positioned on the side of thelongitudinal groove remote from the open side thereof andperpendicularly with respect to said plane, a guide channel for saidheading means in the slide member, said guide channel communicating withthe longitudinal groove, ram means reciprocably mounted in the slidemember and positioned opposite said open side and in alinement with theheading means, hammer means in said groove and reciprocable lengthwisethereof, slide actuating means for said slide member, actuating meansfor thehammer means, said hammer actuating means being coupled to theslide actuating means, and actuating means for the feeding means, theheading means and the ram means in said assembly whereby on movement ofsaid slide member in the guide block causes a nail blank to be fed fromthe inner end of the magazine to a position in front of the longitudinalgroove and likewise causes the ram means to be reciprocated to presssaid blank into said groove in an initial nailforming operation and saidheading member to be reciprocated in the guide channel to form a head onthe partly formed nail in a final nailforming operation, and the hammermeans to drive the formed nail along and out of said longitudinalgroove.

5. A nailmaking and nailing machineadapted toY form nails from sheetmetal blanks and to

